KR-102964281-B1 - ELECTROLYTES CONTAINING ECO-FRIENDLY SUBSTANCES IN SOLVENTS AND WATER-BASED BATTERIES AND ENERGY STORAGE DEVICES CONTAINING THE SAME

Abstract

An aqueous electrolyte containing an eco-friendly material in a solvent, proposed in one aspect of the present invention, comprises an aqueous solvent in which the electrolyte is dissolved, and said aqueous solvent comprises an anti-toxic eco-friendly material.

Inventors

• 유승호
• 성영은
• 이영훈

Assignees

• 고려대학교 산학협력단
• 서울대학교산학협력단
• 기초과학연구원

Dates

Publication Date

20260513

Application Date

20240716

Claims (12)

1. It includes an aqueous solvent in which a salt is dissolved, The above-mentioned aqueous solvent contains non-toxic, eco-friendly substances, and The above eco-friendly material includes [Chemical Formula 1], and At least one of R1 and R2 of the above [Chemical Formula 1] comprises one or more alcohol or carboxyl groups at the terminal end, Aqueous electrolyte containing eco-friendly substances in the solvent. [Chemical Formula 1] (R1 and R2 are alkyl groups having a C1 - C20 main chain, A is a thiol or alcohol group)
2. In paragraph 1, The above eco-friendly material is, A substance comprising one or more of the substances classified as provitamins and vitamins, Aqueous electrolyte containing eco-friendly substances in the solvent.
3. In paragraph 2, The above provitamin contains panthenol, and The above vitamin is one that includes vitamin B5 (pantothenic acid). Aqueous electrolyte containing eco-friendly substances in the solvent.
4. delete
5. delete
6. In paragraph 1, At least one of R1 and R2 of the above [Chemical Formula 1] further comprises one or more of an amide group and a disulfide group in the main chain, Aqueous electrolyte containing eco-friendly substances in the solvent.
7. In paragraph 1, The above-mentioned eco-friendly material is in a liquid or solid state, Aqueous electrolyte containing eco-friendly substances in the solvent.
8. In paragraph 1, The above eco-friendly material is, Comprising one or more selected from the group consisting of panthenol, pantothenic acid, calcium pantothenate, panthethine, and thiopronin, Aqueous electrolyte containing eco-friendly substances in the solvent.
9. In paragraph 1, The above-mentioned eco-friendly material is mixed in an amount of 0.1% to 10% by volume relative to water in an aqueous solvent, and The above electrolyte has eco-friendly and non-toxic characteristics. Aqueous electrolyte containing eco-friendly substances in the solvent.
10. In paragraph 1, The cations of the above electrolyte and the above eco-friendly material form an ion complex to form an ion channel. Aqueous electrolyte containing eco-friendly substances in the solvent.
11. anode; A cathode opposite to the anode above; In an aqueous zinc battery comprising an aqueous electrolyte filling the space between the anode and the cathode, The above-mentioned aqueous electrolyte comprises an aqueous electrolyte containing the environmentally friendly substance of claim 1 in a solvent, Aqueous zinc battery containing eco-friendly materials in the solvent.
12. anode; A cathode opposite to the anode above; An energy storage device comprising an aqueous electrolyte filling the space between the anode and the cathode, The above energy storage device is a capacitor or a supercapacitor, and The above-mentioned aqueous electrolyte comprises an aqueous electrolyte containing the environmentally friendly substance of claim 1 in a solvent, Energy storage device containing eco-friendly materials in a solvent.

Description

Electrolytes containing eco-friendly substances in solvents and water-based batteries and energy storage devices containing the same The present invention relates to an energy storage device. More specifically, the present invention relates to an electrolyte and a solvent of an energy storage device and an energy storage device comprising the same. Recently, as explosion accidents and environmental issues involving lithium-ion batteries using flammable organic electrolytes have increased, water-based batteries using eco-friendly and non-flammable water-based electrolytes are receiving significant attention. Among them, water-based zinc batteries, which use an inexpensive zinc metal plate as the anode and vanadium oxide with a voltage of 1 V or higher as the cathode, are receiving the most attention. However, because water-based zinc batteries use a water-based weakly acidic electrolyte, problems have arisen where hydrogen gas is generated due to corrosion on the zinc metal anode during the charging and discharging process, and dendrites grow on the surface, causing a short circuit in the battery. In addition, vanadium oxide, which was often used as an anode, would leach into the electrolyte and affect the long-term performance of the battery. Conventional studies have solved the above problems by using organic solvents such as propylene carbonate (PC), N, N-dimethyl formamide (DMF), N-methyl formamide (NMF), and acetonitrile together with the weakly acidic aqueous electrolyte, which is the core cause of these problems in aqueous zinc batteries. However, these organic solvents are all highly toxic components and are non-environmental substances that not only cause environmental pollution but also pose toxic side effects to the human body upon exposure. This presented a problem that contrasted with the eco-friendly advantages of water-based zinc batteries. Figure 1 is an image showing the cost, toxicity, and eco-friendliness of electrolytes containing D-panthenol, an eco-friendly solvent according to one embodiment of the present invention, and various zinc salts. Figure 2 is an image showing that a panthenol solvent, which is an eco-friendly solvent according to one embodiment of the present invention, forms an ion complex in relation to a zinc cation. Figure 3 is an experimental result showing that in a symmetric cell of an aqueous zinc battery in which the electrolyte is configured to include an eco-friendly material according to one embodiment of the present invention, dendrite growth is effectively suppressed and very stable long-term stability characteristics are exhibited. Figure 4 is an experimental result showing that in an asymmetric cell of a water-based zinc battery configured with an electrolyte containing an eco-friendly material according to one embodiment of the present invention, the (002) plane of zinc is made dominant, thereby suppressing dendrite growth and exhibiting very stable characteristics, while simultaneously suppressing corrosion and preventing hydrogen generation. FIG. 5 is a graph showing the long-term stability of a full cell fabricated with a sodium vanadate anode and a large-area pouch cell fabricated by configuring an electrolyte to include an eco-friendly material according to one embodiment of the present invention. FIGS. 6 to 8 are structural formulas of panthenol and other materials having a similar molecular structure that can achieve the intended effects in embodiments of the present invention. The embodiments of the present invention are illustrative for the purpose of explaining the technical concept of the present invention. The scope of rights according to the present invention is not limited to the embodiments presented below or the specific description thereof. All technical and scientific terms used in this invention, unless otherwise defined, have the meaning generally understood by those skilled in the art to which this invention pertains. All terms used in this invention are selected for the purpose of further explaining this invention and are not selected to limit the scope of rights according to this invention. Expressions such as "comprising," "having," "having," etc. used in the present invention should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions. Unless otherwise stated, singular expressions described in the present invention may include the meaning of the plural form, and this applies likewise to singular expressions described in the claims. Embodiments of the present invention will be described below with reference to the attached drawings. Furthermore, in the description of the following embodiments, the description of identical or corresponding components may be omitted. However, even if a description of a component is omitted, it is not intended that such component is not included in any embodiment. In order to solve the above